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2 Sheets-#Sheet 2. G. W. WEISS.

SEWING MACHINE. No. 552,216. Patented Deo. 31, 1895.

UNITED STATES f PATENT OEETCE.

GEORGE IV. IVEISS, OF BROOKLYN, ASSIGNOR TO JOHN STEWART, OF

NEIV YORK, N. Y. i

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent N o. 552,@16, datedDecember 31, 1895. Application filed January 16, 1893. Serial No.458,556. (No model.)

To all whom t may concern:

Be it known that I, GEORGE W. WErss, of Brooklyn, in the county of Kingsand State of New York, have invented a new and useful Improvement inzigzag-Stitch Sewing-Wlachines, of which the following is aspecification.

My invention relates to an improvement in zigzag-stitch sewing-machinesin which the needle is carried bodily back and forth across' the path ofthe goods to be operated upon.

My invention contemplates a construction which may be readily attachedto a type or types of sewing-machines now in general usesuch, forexample, as the Villcox & Gibbs machine-and provides for the movement ofa guide-plate and the looper to correspond with the lateral movementofthe needle.

A practical embodiment of my invention is represented in theaccompanying drawings, in which- Figure l is a view of a machine in sideelevation, partly in section, showing the needle at the middle of itslateral movement. Fig. 2 is a top plan view. Fig. 3 is a view in detail,showing the needle at the limit of its outward lateral movement. Fig. 4is a view in detail,

showing the needle at the limit of its inward` lateral movement; andFigs. 5, 6, and 7 represent the conditions of the stitch at the stepswhen the needle occupies the positions shown in Figs. 1, 3, and 4:,respectively.

I have shown the zigzag-stitch-forming mechanism in the accompanyingdrawings in connection with the frame and operating mechanism of anordinary IVillcox dit Gibbs sewing-machine. The frame is denoted by A,the vibrating arm by B, the pulley for operating the looper-shaft andvibrating arm by O, and the connecting-rod for transmitting motion tothe vibrating arm by D.

The vertically-reciprocating needle-bar E, which receives its motionfrom the end of the vibrating arm B, is provided with a pair oflaterally-extending pins or studs e for supporting the auxiliaryneedle-bar E. The bar E is provided with sockets for the reception ofthe pins e, so as to permit the -bar E to slide laterally on the pins e,while at the same time it is reciprocated vertically, together with theneedle-bar E. The lower endof the bar Eis turned, as shown at e,underneath the lower end of the needle bar E, and is there provided.with a suitable socket and clampescrew e2 for securing the needle F tothe bar E. The bar E is provided with laterally-extending lugs c3 ande4, through which guide-studs g g extend into elongated slots g2 g3,formed in the end of the reciprocating frame G. lThe frame Gis securedto the frame A of the machine by means of bearing-screws H H, which passthrough elongated slots g4 g5 in the frame, and while preventing it frommoving vertically permit it to move laterally on the bearing-screws H H.The slots g2 and g3 in the frame G are sufficiently long to allow forthe vertically-reciprocating movement of the needle-bar. Thedownwardlyextending portion of the frame G is provided with an elongatedslot gs, through which a pivotal bolt 7L extends, the said bolt hextending at the same time through a slot 7l in the vibrating arm I,pivotally secured at its upper end, as at K, to a support on the frame Aand at its lower end engaged with a cam Z on the rotary shaft L.

The arm I is provided at or near its lower end with aninwardly-extending stud t" adapted to engage the grooves in the caml andvibrate the arm I as the shaft L is rotated by the pulley O.

The connection between the arm I and the frame Gis such that, as the armI is vibrated the frame G, and hence the needle-bar E and needle F, willbe moved back and forth ina direction lateral with respect to theverticallyreciprocating movement of the needle. The action of the camZupon the armI is so timed with respect to the verticallyreciprocatingmovement of the needle that the needle will be movedV laterally while itis at or near the limit of its upward stroke.

In order to adjust the looper M in position to take the loops properlyfrom the needle when the needle is at the limits of its lateralmovement, IY provide for moving the looper bodily along underneath thework-table N to correspond with the lateral movement of the needle abovesaid table. This I accomplish by making that portion L of thelooper-shaft to which the looper M is attached separate from the portionL of the looper-shaft to which the pulley O is secured and securing theparts L and L together, so that the latter will rotate with the former,but at the same time will be permitted a longitudinally-sliding movementindependent of the former. To this end I iix a sleeve L2 to theshaft-section Ll and arrange the end of the shaft-section L in thesleeve L2, so that the sleeve may slide on the shaft L and at the sametime be forced to rotate therewith by setting a screw or pin Z in theshaft L and extendingit within an elongated slot Z2 in the sleeve L2.The sleeve L2 is provided with an annular groove Z3, and the lower endof the depending portion of the frame G is preferably bifurcated and itsbranches provided with studs g", adapted to enter the annular groove Z3and, while permitting the sleeve to rotate freely, cause it and theshaft-section L fixed to it to move longitudinally back and forth withthe frame Gr A movable guide-plate O is located beneath the work-table Nand provided with a perforation o of sufficient size to permit theneedle to pass therethrough without binding. The guide-plate O is causedto move in harmony with the lateral movements of the needle and looperby means of a stud o', attached to its inner end, which enters thegroove Z3 in the i sleeve L2, and while permitting the free rotarymovement of the sleeve relatively to the plate serves to move the platelongitudinally together with the sleeve and the portion of the shaftcarrying the looper, The movement of the guide-plate O will notinterfere with the passage of the work over the table M, and at the sametime it will form a guide for the needle and cause it to present theloop free from the fabric in position to be taken up properly by thelooper.

rlhe feed (not shown herein) may be ofthe ordinary structure commonlyused in connection with machines of this class.

In operation, suppose the needle to be in the position shown in Fig. l,midway of the stitch, the thread will occupy the position shown in thediagram, Fig. 5, the needle being represented by F and the loop drawn bythe looper into the position shown in dotted lines beneath the positionof the needle F. As the needle moves laterally to the extremity of itsupward movement, then downwardly through the work into the positionshown in Fig. 3, the thread will assume the position shown in diagram,Fig. (i. As the needle returns to the limit of its upper stroke and isagain moved, together with the looper, laterally to the oppositeextremity of its lateral movement, and then again inserted through thework into the position shown in Fig. Il, the thread will have beencarried into the position shown in the diagram, Fig. 7, and anadditional completed stitch will have been made. The zigzag arrangementof the stitches is due to the combined movements of the work in thedirection shown by the arrow P in Fig. 5 and the lateral movement of theneedle and looper in the direction shown by the arrows p and 1J', Figs.5 and 7.

In case it be desired to form a lock-stitch instead of a chain-stitch,the shuttle-carrier and shn ttle,which for the purposes of my presentinvention may be considered a looper, may be reciprocated in a mannerquite similar to that described in reference to the rotary hook-looper.

W'hat I claim isl. A sewing machine comprising a verticallyreciprocating needle bar, with means for operating it, and havinglaterally extending guides, an auxiliary needle bar movably supported onsaid lateral guides, a sliding frame provided with vertical guide ways,said auxiliary needle bar having projections engaging said guide-ways, aswinging arm pivoted to the frame of the machine and pivotally engagin gthe sliding frame, means for operatin g said swinging arm, andcomplementa] stitch forming mechanism; substantially as described.

2. A sewing machine comprising a vertically reciprocating needle barprovided with laterally extending pins or studs, an auxiliary needle barprovided with sockets fitting over said pins, said auxiliary needle barprovided with lateral studs, a sliding frame as G provided with verticalslots g2, g3 in which thc lateral studs on the auxiliary needle barwork, a swinging arm pivoted to the framework of the machine andconnected at its lower end with operating means on the main shaft, andhaving a pivotal connection with the sliding frame, and complementalstitch forming mechanism; substantially as described.

3. A sewing machine comprising a needle bar having the lateral extendinglugs e, c, the auxiliary needle bar having the sockets for the receptionof the lugs e, c and having studs g, g', the sliding frame G havingelongated vertical slots g2, g3 in which the studs g, g' extend, andhaving horizontal elongated slots g4, g5 and screws passing therethroughinto the frame of the machine, a swinging arm I pivoted at one end tothe frame of the machine and provided with an elongated vertical slot, astud passing through said elongated vertical slot from the sliding frameGr, a main shaft, a rotating cam on said main shaft, with connectionsbetween said cam and the swinging arm I, and complemental stitch formingmechanism 5 substantially as described.

4. The combination with a looper, suitable support therefor, a vibratingarm, means for operating it, and a needle bar attached to said vibratingarm, of an auxiliary needle bar supported upon the aforesaid needle barand having a movement laterally with respect thereto, a sliding framehaving a loose engagement with said auxiliary needle bar, a swinging armengaged with said sliding frame and with a rotary cam for operating thesliding frame and hence the auxiliary needle bar, and connectionsbetween the sliding frame and the looper support whereby the latter isreciprocated, substantially as set forth.

IOO

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5. The combination with the looper, a support to Which said looper isattached, a vibrating arm, means for operating it, and a needle barattached to said vibrating arm, of an auX- iliary needle bar supportedupon the aforesaid needle bar and having a movement laterally withrespect thereto, a sliding frame having a loose engagement With saidauxiliary needle bar, a swinging arm engaged with said sliding 1o frameand With a rotary cam for operating the sliding frame and hence theauxiliary needle bar, and a stud and sleeve connection between saidsliding frame and the looper support whereby the latter is reciprocated;substantially as described.

GEORGE W. WEISS. Witnesses:

I. B. DECKER, FREDK. HAYNEs.

